Fabricated nanogap-rich plasmonic nanostructures through an optothermal surface bubble in a droplet

A rapid and cost-effective method for the fabrication of nanogap-rich structures is demonstrated in this Letter. The method utilizes the Marangoni convection around an optothermal surface bubble inside a liquid droplet with a nanoliter volume. The liquid droplet containing metallic nanoparticles red...

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Bibliographic Details
Published inOptics letters Vol. 43; no. 2; p. 334
Main Authors Karim, Farzia, Vasquez, Erick S, Zhao, Chenglong
Format Journal Article
LanguageEnglish
Published United States 15.01.2018
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Summary:A rapid and cost-effective method for the fabrication of nanogap-rich structures is demonstrated in this Letter. The method utilizes the Marangoni convection around an optothermal surface bubble inside a liquid droplet with a nanoliter volume. The liquid droplet containing metallic nanoparticles reduces the sample consumption and confines the liquid flow. The optothermal surface bubble creates a strong convective flow that allows for the rapid deposition of the metallic nanoparticles to form nanogap-rich structures on any substrate under ambient conditions. This method will enable a broad range of applications such as biosensing, environmental analysis, and nonlinear optics.
ISSN:1539-4794
DOI:10.1364/ol.43.000334